Need help on a domain name starter site

I just bought a site called Filesindex.com
Would anyone recommend what topic I can create this website to be? I was thinking maybe people upload random files to share with their friends or something a long those lines. Any help will do, thanks!!!

You'd have to spend a lot of money on servers if you want to create a file hosting site. Instead of that, I'll recommend that you create a search engine where someone could type a query and select a file type (say .mp3) and every MP3 files in the web related to the query would come up. You can easily achieve this using Google APIs and Google dorks, there are many people who don't know how to make a search on Google for files.
Checkout these sites: http://www.uvrx.com/ and http://www.sharedigger.com/

P.S. That's a good domain name, you hand regged that?

The best what I can suggest you is to index the files and links to get good position on Google.What say?